Perpetual calendar



2 Sheets-Sheet 1.

(No Model.)

A. J. MEDALIE.

PERPETUAL CALENDAR.

Patented Sept I n Mr. "M Z x M 0 ATM/M58 n1: mums FEYERS 00., mum-un-o.,wmmaruu, n. c.

2 Sheets-Sheet 2.

A. J. MED E.

PERPETUAL 0A DAR.

No. 435,664. Patented Sept. 2, 1890.

UNITED STATES PATENT OFFICE.

ALEX. J. MEDALIE, or MANCELONA, MICHIGAN.

PERPETUAL CALENDAR.

SPECIFICATION forming part of Letters Patent No. 435,664, datedSeptember 2, 1890.

Application filed July 3, 1890- Serial No. 357,676. (No model.)

To all whom it may concern:

Be it known that I, ALEX. J. MEDALIE, a citizen of the United States,residing at Mancelona, in the county of Antrim and State of Michigan,have invented certain new and useful Improvements in PerpetualCalendars; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use same.

d My invention relates to a perpetual calen- My object is to construct adevice of this description which, upon being adjusted only once in eachyear, will register correctly the days of the week and of the month forany year from A. D. 1 to 5000; and it consists in the construction,combination, and arrange ment of parts hereinafter described,and par-,

ticularly pointed out in the claims, reference being had to theaccompanying drawings, wherein-- Figure 1 is a front view of a deviceembodying my invention, and Fig. 2 a detail of the rotatable disk andthe tablets thereon movable therewith.

A represents a suitable face-plate, of cardboard or other suitablematerial, to which the rotatable disk B is centrally pivoted, and hasthe fan-shaped view opening or aperture A, through which the tabletsupon B are shown.

Upon A are arranged a number of fixed tablets. Tablet 1 contains thedays of the month arranged in gradation in seven parallel lines and fivevertical columns. Tablet 2 cantains the months of the year arranged inrotation radially along the margin of the view-opening. Tablet 3contains the two left-hand figures of the centuries from A. D. 1 to5000, inclusive, arranged in twelve vertical columns and seven parallellines in spaces formed bya series of vertical lines crossed at rightangles by a series of lateral lines. Tao let 4 is placed at right anglesto tablet 3,and contains the two right-hand figures of the centuries forthe same period arranged in fourteen vertical columns and eighteenparallellines. Tablet 5 is the register-index, and contains theposition-numbers 1 to 14, inclusive, arranged, as shown, in fourteenvertical umns of tablet 4 and seven parallel lines in continuation ofthe parallel lines of tablet 3. It will now appear that the intersectingperpendicular lines of tabletgi and parallel lateral lines of tablet 3at their junction in continuation in tablet 5 inclose a space withinwhich is placed a position figure or number, and that a correspondingposition number or figure will be found in tablets S or 9 upon themargin of the disk 13. (Shown in Fig. 2.) Tablets 6 and 7 contain thedays of the week. Tablet 6 is arranged for common years, and tablet 7for leap-years. Tablet 9 registers for tablet (3, and tablet S fortablet 7.

The names of the days of the week are arranged in concentric annularlines and radial lines, each name being inclosed in a segmental spaceformed, by intersecting radial and circumferential spacing lines. Thereare thirteen radial lines of names and twelve names in each line, makingtwelve annular lines or columns of names in each tablet; but the openingA in the face-plate A is of such size as to expose to view seven only ofthese radial lines. Therefore only seven are at any one time in view,and the disk 13 is pivoted to the back of A to revolve in such manner asto bring each row or each series of seven rows within the view-openingA. The positionnumbers in the tablet 9 are so adjusted with relation totablet 6 that when the figure 1 is opposite the point of the arrow onplate A the first seven radial lines of tablet 6 will be within theview-opening A, and when by the movement of the disk upon its pivot fromleft to right the figure 2 is opposite the arrow the next seven lineswill be within view-that is, one line passing out of sight underneaththe margin of the opening at each adjustmentand the tablet 8 is adjustedwith relation to the tablet 7 in a similar manner.

The operation of my device is as follows: To adjust the same for anygiven year, find the first two figures of the year in the tablet 3 andthe last two in the tablet 4t, and the figure or figures at the junctionof the columns in tablet 5 is the position-number for that year. Turnthe disk until the corresponding position-number in tablet 8 or 9 isopposite to the arrow. The calendar is then adjusted to regcolumns incontinuation of the vertical colister for that year. It will be observedthat the circumferential division-lines upon the plate B register withthe names of the month in tablet 2 and that the radial lines registerwith the days of the month in tablet 1.

In Fig. 1 the calendar is adjusted for registering all common yearshaving the first day of the year fall upon the first day of the week, ofwhich the years 1809, 1815, 1826, 1837, 1843, 1854, 1865, 1871, 1882,1893, and 1899 are examples in the present century.

WVhat I claim to have invented, and desire to secure by Letters Patentof the United States, is-- 1. As a new article of manufacture, a perpetual calendar consisting of a faceplate A, having asegmental-faceshaped view-aperture A at one side of the central pivot,and bearing fixed tablet 1, containing the days of the month, arrangedin regular order in five vertical and seven parallel lines adjacent tothe narrow side of the view-opening; tablet 2, containing the names ofthe months of the year, arranged radially in regular order adjacent toone of the sides of the opening; tablet 3, containing the first twofigures of the centuries, arranged in vertical and parallel rows; tablet4, containing the last two figures of the centuries, arranged invertical and parallel rows, and tablet 5, containing the positionnumbersarranged at the junction of the several vertical rows of figures intablet 4 and the several lateral rows of figures in tablet 3, prolongedand intersecting, as described, and a rotating plate or disk 13,centrally pivoted to the back of plate A and bearing tablet 6, arrangedfor common years and containing the names of the days of the week,arranged in annular and radial lines, of which radial lines seven onlyare exposed through the opening A, and having the tablet 9, containingthe position-numbers related thereto and to tablet 5, as described, andtablet 7, arranged for leap-years and containing the days of the week,also arranged in annular and radial lines, of which radial lines sevenonly are exposed through the opening A, and having of the month arrangedin regular order in vertical and parallel lines adjacent to theviewopening; a tablet 2, containing the names of the months of the year,arranged in regular order in a line at an angle to tablet 1; a tablet 3,containing the first two figures of the centuries, arranged separatelyin vertical and parallel lines; a tablet 4, containing the last twofigures of the centuries, arranged at right angles to tablet 3, havingthe said figures arranged separately in vertical and parallel rows; atablet 5, arranged at the junction of tablets 3 and 4 and containingposition-numbers at the junction or intersection of the vertical linesof tablet 4 and the parallel lines of tablet 3, prolonged, respectively,as described, and a relatively-movable plate B, arranged at the back ofA, bearing tablets 6, arranged for common years, and 7, arranged forleap-years, and having the names of the days of the week arranged inregular order in a series of substantially parallellines, only seven ofwhich lines are exposed through the view-opening, and registering withthe names of the month and the days of the month in tablets 1 and 2,respectively, and having tablets 8 and 9 related thereto and to tablet5, substantially as set forth, whereby such portion of the tablets maybe exposed as may be indicated, substantially as described, and for thepurposes set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ALEX. J. MEDALIE. Witnesses:

NELsoN C. WETER, (J. L. BAILEY.

